Malicious PDF — malware analysis report

Static analysis result for SHA-256 2472986121fbf76e…

MALICIOUS

PDF

74.2 KB Created: 2021-03-29 15:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b76f01053821cf46692d78dcdbf7bfef SHA-1: 63439457469af10cbed56a40dbd003a725fffa42 SHA-256: 2472986121fbf76e7f054a704f360565e6dbd0c85d2e4520e91e8e5109137a4b
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged as malicious by a ClamAV signature and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains text fragments that, combined with the 'SE_URGENCY_LURE' heuristic, suggest a pretext for user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=pebble+watch+charger+cost
    • https://static.s123-cdn-static.com/uploads/4369310/normal_5ff4591570269.pdf
    • http://datulosuwila.iblogger.org/3689247736.pdf
    • https://cdn-cms.f-static.net/uploads/4447098/normal_5fdc3cca502c8.pdf
    • http://sizuxofutitarax.mypressonline.com/dudajexunusorusirize.pdf
    • https://static.s123-cdn-static.com/uploads/4370778/normal_6008ffa1e6101.pdf
    • https://cdn.sqhk.co/sobetevod/pgMEjih/zawamijonegonumur.pdf
    • https://cdn.sqhk.co/noligigibar/7kjiZn0/mobub.pdf
    • https://cdn.sqhk.co/jufebarur/jgegeih/number_one_copper_prices_near_me.pdf
    • https://cdn.sqhk.co/vekuperik/O7hiyxL/25278191081.pdf
    • http://pivifemopore.22web.org/ccna_study_guide_8th_edition.pdf
    • http://pinegobojefo.getenjoyment.net/cengage_physical_chemistry_free_download.pdf
    • https://cdn.sqhk.co/tobizopowebo/cIge1Ir/florida_man_finds_snake_in_toilet.pdf
    • http://navevukosuso.mypressonline.com/how_to_speed_up_club_car_precedent_gas.pdf
    • http://gusebozaromurel.mypressonline.com/dogil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rajokonola.epizy.com/fawekejiravogasok.pdf
    • http://baromar.epizy.com/kshatriya_video_song.pdf
    • http://kunopeto.epizy.com/37845430108.pdf
    • http://giwalawap.epizy.com/49693925661.pdf
    • http://sogisujomixugo.epizy.com/novezaxopotifedure.pdf
    • http://kegebezevenaku.epizy.com/jofazokesoz.pdf
    • http://luvepajimape.epizy.com/adobe_reader_for_pc_windows_7.pdf
    • http://wedizakur.epizy.com/56166241577.pdf
    • http://xuneviwek.epizy.com/30387924034.pdf
    • http://legolipif.epizy.com/gokidemipo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e16e.bin
c9426d40f67617d27dbff7753471d6d41e221a673108b165c0bd5b8a70316aa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 5292 bytes
font_01_sfnt_off0000f37e.bin
0296c09c38a60cf30435cf0042c49e76e257617e5e4821251d533e74a5c97eb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 11544 bytes

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